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// USRP - Universal Software Radio Peripheral
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// Copyright (C) 2007 Corgan Enterprises LLC
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Boston, MA 02110-1301 USA
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`include "../../../../usrp/firmware/include/fpga_regs_common.v"
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`include "../../../../usrp/firmware/include/fpga_regs_standard.v"
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module sounder(clk_i, saddr_i, sdata_i, s_strobe_i,
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tx_strobe_o, tx_dac_i_o, tx_dac_q_o,
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rx_adc_i_i,rx_adc_q_i,
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rx_strobe_o, rx_imp_i_o,rx_imp_q_o);
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input clk_i; // Master clock @ 64 MHz
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input [6:0] saddr_i; // Configuration bus address
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input [31:0] sdata_i; // Configuration bus data
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input s_strobe_i; // Configuration bus write
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output tx_strobe_o; // Generate an transmitter output sample
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output [13:0] tx_dac_i_o; // I channel transmitter output to DAC
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output [13:0] tx_dac_q_o; // Q channel transmitter output to DAC
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output rx_strobe_o; // Indicates output samples ready for Rx FIFO
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input [15:0] rx_adc_i_i; // I channel input from ADC interface module
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input [15:0] rx_adc_q_i; // Q channel input from ADC interface module
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output [15:0] rx_imp_i_o; // I channel impulse response to Rx FIFO
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output [15:0] rx_imp_q_o; // Q channel impulse response to Rx FIFO
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sounder_ctrl master(.clk_i(clk_i),.rst_i(reset),.saddr_i(saddr_i),
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.sdata_i(sdata_i),.s_strobe_i(s_strobe_i),
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.reset_o(reset),.transmit_o(transmit),.receive_o(receive),.loopback_o(loopback),
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.degree_o(degree),.ampl_o(ampl),.mask_o(mask),.tx_strobe_o(tx_strobe_o),
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.rx_strobe_o(rx_strobe_o),.sum_strobe_o(sum_strobe),.ref_strobe_o(ref_strobe));
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// Loopback implementation
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wire [13:0] tx_i, tx_q;
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wire [15:0] tx_i_ext, tx_q_ext;
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wire [15:0] rx_i, rx_q;
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sign_extend #(14,16) tx_i_extender(tx_i, tx_i_ext);
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sign_extend #(14,16) tx_q_extender(tx_q, tx_q_ext);
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assign tx_dac_i_o = loopback ? 14'b0 : tx_i;
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assign tx_dac_q_o = loopback ? 14'b0 : tx_q;
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assign rx_i = loopback ? tx_i_ext : rx_adc_i_i;
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assign rx_q = loopback ? tx_q_ext : rx_adc_q_i;
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sounder_tx transmitter
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( .clk_i(clk_i),.rst_i(reset),.ena_i(transmit),
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.strobe_i(tx_strobe_o),.mask_i(mask),.ampl_i(ampl),
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.tx_i_o(tx_i),.tx_q_o(tx_q) );
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( .clk_i(clk_i),.rst_i(reset),.ena_i(receive),
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.sum_strobe_i(sum_strobe),.ref_strobe_i(ref_strobe),
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.mask_i(mask),.degree_i(degree),
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.rx_in_i_i(rx_i),.rx_in_q_i(rx_q),.rx_i_o(rx_imp_i_o),.rx_q_o(rx_imp_q_o));